Transformer.h

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#ifndef TRANSFORMER_H_32113356
#define TRANSFORMER_H_32113356

#include <iostream>
#include <map>
#include "uscxml/Interpreter.h"
#include "uscxml/interpreter/InterpreterImpl.h"

namespace uscxml {

class USCXML_API TransformerImpl {
public:
    TransformerImpl(const Interpreter& other) {
        interpreter = other; // we need to keep a reference to retain the document!
        other.getImpl()->init();
        _document = other.getImpl()->_document;
        _baseURL = other.getImpl()->_baseURL;
        _scxml =  other.getImpl()->_scxml;
        _name =  other.getImpl()->_name;
        _binding = other.getImpl()->_binding;
    }

    virtual void writeTo(std::ostream& stream) = 0;
    virtual operator Interpreter() {
        throw std::runtime_error("Transformer cannot be interpreted as an Interpreter again");
    }

protected:
    std::multimap<std::string, std::string> _extensions;
    std::list<std::string> _options;

    XERCESC_NS::DOMDocument* _document;
    XERCESC_NS::DOMElement* _scxml;

    Interpreter interpreter;
    InterpreterImpl::Binding _binding;
    URL _baseURL;
    std::string _name;

    friend class Transformer;
};

class USCXML_API Transformer {
public:
//  Transformer(const Interpreter& source) { _impl = new (source) }

    Transformer() : _impl() {} // the empty, invalid interpreter
    Transformer(std::shared_ptr<TransformerImpl> const impl) : _impl(impl) { }
    Transformer(const Transformer& other) : _impl(other._impl) { }
    virtual ~Transformer() {};

    operator bool() const {
        return !!_impl;
    }
    bool operator< (const Transformer& other) const     {
        return _impl < other._impl;
    }
    bool operator==(const Transformer& other) const     {
        return _impl == other._impl;
    }
    bool operator!=(const Transformer& other) const     {
        return _impl != other._impl;
    }
    Transformer& operator= (const Transformer& other)   {
        _impl = other._impl;
        return *this;
    }

    virtual void writeTo(std::ostream& stream) {
        _impl->writeTo(stream);
    }
    operator Interpreter() {
        return _impl->operator Interpreter();
    }

    std::shared_ptr<TransformerImpl> getImpl() {
        return _impl;
    }

    void setExtensions(const std::multimap<std::string, std::string>& extensions) {
        _impl->_extensions = extensions;
    }

    void setOptions(const std::list<std::string>& options) {
        _impl->_options = options;
    }

protected:
    std::shared_ptr<TransformerImpl> _impl;

};

}

#endif /* end of include guard: TRANSFORMER_H_32113356 */